1 ; RUN: opt < %s -loop-vectorize -mtriple=x86_64-apple-macosx10.8.0 -mcpu=corei7-avx -S | FileCheck %s 2 3 target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" 4 target triple = "x86_64-apple-macosx10.8.0" 5 6 @c = common global [2048 x i32] zeroinitializer, align 16 7 @b = common global [2048 x i32] zeroinitializer, align 16 8 @d = common global [2048 x i32] zeroinitializer, align 16 9 @a = common global [2048 x i32] zeroinitializer, align 16 10 11 ; The program below gathers and scatters data. We better not vectorize it. 12 ;CHECK-LABEL: @cost_model_1( 13 ;CHECK-NOT: <2 x i32> 14 ;CHECK-NOT: <4 x i32> 15 ;CHECK-NOT: <8 x i32> 16 ;CHECK: ret void 17 define void @cost_model_1() nounwind uwtable noinline ssp { 18 entry: 19 br label %for.body 20 21 for.body: ; preds = %for.body, %entry 22 %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ] 23 %0 = shl nsw i64 %indvars.iv, 1 24 %arrayidx = getelementptr inbounds [2048 x i32], [2048 x i32]* @c, i64 0, i64 %0 25 %1 = load i32, i32* %arrayidx, align 8 26 %idxprom1 = sext i32 %1 to i64 27 %arrayidx2 = getelementptr inbounds [2048 x i32], [2048 x i32]* @b, i64 0, i64 %idxprom1 28 %2 = load i32, i32* %arrayidx2, align 4 29 %arrayidx4 = getelementptr inbounds [2048 x i32], [2048 x i32]* @d, i64 0, i64 %indvars.iv 30 %3 = load i32, i32* %arrayidx4, align 4 31 %idxprom5 = sext i32 %3 to i64 32 %arrayidx6 = getelementptr inbounds [2048 x i32], [2048 x i32]* @a, i64 0, i64 %idxprom5 33 store i32 %2, i32* %arrayidx6, align 4 34 %indvars.iv.next = add i64 %indvars.iv, 1 35 %lftr.wideiv = trunc i64 %indvars.iv.next to i32 36 %exitcond = icmp eq i32 %lftr.wideiv, 256 37 br i1 %exitcond, label %for.end, label %for.body 38 39 for.end: ; preds = %for.body 40 ret void 41 } 42 43 ; This function uses a stride that is generally too big to benefit from vectorization without 44 ; really good support for a gather load. We were not computing an accurate cost for the 45 ; vectorization and subsequent scalarization of the pointer induction variables. 46 47 define float @PR27826(float* nocapture readonly %a, float* nocapture readonly %b, i32 %n) { 48 ; CHECK-LABEL: @PR27826( 49 ; CHECK-NOT: <4 x float> 50 ; CHECK-NOT: <8 x float> 51 ; CHECK: ret float %s.0.lcssa 52 53 entry: 54 %cmp = icmp sgt i32 %n, 0 55 br i1 %cmp, label %preheader, label %for.end 56 57 preheader: 58 %t0 = sext i32 %n to i64 59 br label %for 60 61 for: 62 %indvars.iv = phi i64 [ 0, %preheader ], [ %indvars.iv.next, %for ] 63 %s.02 = phi float [ 0.0, %preheader ], [ %add4, %for ] 64 %arrayidx = getelementptr inbounds float, float* %a, i64 %indvars.iv 65 %t1 = load float, float* %arrayidx, align 4 66 %arrayidx3 = getelementptr inbounds float, float* %b, i64 %indvars.iv 67 %t2 = load float, float* %arrayidx3, align 4 68 %add = fadd fast float %t1, %s.02 69 %add4 = fadd fast float %add, %t2 70 %indvars.iv.next = add nuw nsw i64 %indvars.iv, 8 71 %cmp1 = icmp slt i64 %indvars.iv.next, %t0 72 br i1 %cmp1, label %for, label %loopexit 73 74 loopexit: 75 %add4.lcssa = phi float [ %add4, %for ] 76 br label %for.end 77 78 for.end: 79 %s.0.lcssa = phi float [ 0.0, %entry ], [ %add4.lcssa, %loopexit ] 80 ret float %s.0.lcssa 81 } 82 83
